Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd82dc0e7a1966f393feb9ce4bcdd400cd2ecdf3b37ea2fad1930ef1e210095e' 
  AND token = 'NJbmG4JVP6n8vqYW53roKSyzGvWPb1YZsd4l+t2rs34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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