Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0146691574e8757c71b08d5afcee0ee408c005bba3ec2d4658dc5e15f51b493' 
  AND token = '9z+NOQyH8Olzg0bZbsFzf9sq4sB/QFMD8xnQpEqeuKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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