Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59c6de7d7fff65e0b490a09b13e01ad473c1a009b83f395c13add900fdc92195' 
  AND token = 'Z6DFcJ2iykHAzN2aZ4IitPn6mPUZfo5ATaMk0F5UWXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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