Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '994e2cbebb4519aad74356db88dc471eec46fad3d2dd678f4d54a9f69847617d' 
  AND token = 'ZnkrBL93Kw6mxRscrSoOW034tBFZfJDS+D2SPuSVCJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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