Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0f503c844ee09933997d7da24053ef974b8ef9d38f2478ee22ed2868e541b8d' 
  AND token = 'HFV6br7TKYd1b0AIAcl5I9GcZ/NCwdeJLKMOIku9QKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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