Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8fd68a1dfd643cc73e4e811b12e938775fbfb24c3669d84f912d6e29d7e741e' 
  AND token = 'Q9YwwE0ZQ7OVPeHnM3tX69k93f6nsFWm6dz2RV6Cv1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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