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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f426d1d3908db8d7ba2d762ef7be483c6a2e99eba6f2318ce002b3ee4edfa9a6' 
  AND token = 'tVmkYFEYnTKwrfpdV4qxrV4lYRMX5i3WmOtLsgJJmzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}