Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75122451f4775f2782d0cee37a7158822e7ed955b40462e1813ef75baf38162c' 
  AND token = 'vQViVaJN/DoyyPwib0cvXMKL00ukyUXg0a3zYlbdG8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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