SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a58f2ec3ab3a183f345a91b271251d2404ad8245a535ff39891475bd4349fc27' 
  AND token = 'n2dzGz47xWXKPreulQ+LT7kQV6kKtnCqJX8KV0pTQH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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