Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9885b4669100187daa5e56bb065f7812fbd69a85d7d74af73463ccf0b9ad2cf1' 
  AND token = 'PzG2hANh5L8kI7equRMv9SHz1i+De+0ZLEAhQ3TF7eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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