Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38d6537cb5a590211652ed33734c5d2c3ad0a12b2abddb88586918f3dc21f500' 
  AND token = 'AZoq53Ho9AcoDzoNoNKFJwBWpG+THhBksaIYF51aG2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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