Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f87744511b13455dd59a32445a2c726c05950e0bef7f2d757e70bf177784cd1' 
  AND token = 'CF3vhIUR/Neseqe+t4TLwP6rEuUtDO+gzn4Tcqnay8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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