Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa68ed54ec9b3a4e5535a4b3c519c07a7d9131510d42d257541186c1c5e97ca2' 
  AND token = 'PqPYMpJEHIYxvfXbnoB17pOz6OWtJ3do6ioLSxr0Qq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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