Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a93975846b25479b4547ee4146f94707b2200ff350349b51ab623436e634958' 
  AND token = 'OGzE2SRunZYoEOX59MjKXlfPeZFmNgTnoeywjLD7hoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00101

JSON explain

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