Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd753e3369f5f3b4adc7bd95d312335b889a9f650b06c9053b23703232f595a00' 
  AND token = 'QYS9db3V5bhx978Pmwx1f+1GNyf/K7NnVaN/VODE4Ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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