Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '383c796a69113ce42a5940f743111650d2b975b740ce85f3e717c2e0edbc4e59' 
  AND token = 'ne8vd51wda4YPmB+Qpl9FmTtHJGhfuua+pGWKEdPcQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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