Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cc1365b352908727e8a53451726c62449a55ee48e425393cebd048d50e04903' 
  AND token = 'BWvT/nhyceMQ6MEo8y8R3xvm4tPNDTbdUEUBp0q8nyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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