Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bef5e53a08ea507ce0a8a2654e034c733d664540e8b855ca0e508455152dd7a3' 
  AND token = 'NVtr9ngM0U/923ixwBGaf9aWzbmUEK9Dt9kpRCDT6I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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