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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94facc967d2a62c47cf4a8c83d58190bc5ccecefc032521876a7f02fe1f66cce' 
  AND token = 'OMpymj2onKV2ZGxk0HlL+20dyycx2utvVUxJS9qRsus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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