Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '775904097e83a72daafb13150fbcc9d966104d3dadc5418bb2be81aa7065824c' 
  AND token = 'myKhvFWpEUFpAJ+eUF5Z0dKiFRbcffNIDCRXoGZintk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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