Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '975a16926798967fe6797b61c41f351f0ce93d592f6744bb59d781abbff5c1f5' 
  AND token = 'L3JBYa9wO11IyUpd+LN0XlFou9zIbho2fpLP4X++b08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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