Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba6651b69d1a615047f0b3caeb98e5f41d2c186b2cb8cb516b77d43f1b2dfd42' 
  AND token = 'dQUm6RXMMfHKHaJNvHyJyZ4ZEjypXI1Irq7bqAIOt3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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