Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62bcc06ce1e2a25db70c3edce383d3aaaa14494fb5d44dc0898e0bc0b38ff399' 
  AND token = 'dFri6Z1g451a8RNjCRZWqiQdkEGhAEOviwHl05Dyh24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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