Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11b62b9b2c26f3b54658372f65b0b040f1c1f8f816cd4e9e258edc53d8e06013' 
  AND token = 'o34lTlHC8B6fM6xH5uSKHjh3Mp5b5Wgb2B3Etj+MMwc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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