Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf52007a656f53a0d0b0206247f7f768b4826007037351e9d113d97eedb0322b' 
  AND token = 'XU4rn9yHyFpjnkhbogzUkP0/rvSejU5zi+/rAQrVDuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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