Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25b495575f22f040142a201038f055c744dfb2c40d6f245010d3814d0e673da5' 
  AND token = 'oNi+uX3ETkdMtilG2E2SX3S76vrE9tOU7HEEjh5Sul4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}