Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '198d96a4b521f4ac22f5a52578e2a23fb30239c63fbec92048312489291b388e' 
  AND token = 'K53hAGN1RM8PMx1iKLFpm/coyzZ4lxo7dJB2JHAmBi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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