Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ac65762b5cca8c4ac7311b93dee4e80c9611781e1a41c9fbb1418b555c42d1c' 
  AND token = 'CYcYCESevUwTTz/DcdHROS5qyHQOC+jMGzu9b6YaOSs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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