Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdee47cb6e906360b08938f0fbf1ed4b7d6b09d26a35c59908fd6bd44f6e2ba0' 
  AND token = 'TJv7+WGzEKEjro0rIRqFsF8tm5EeCQFqxgbGmIRXUNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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