Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d5065eac2f7456c05244d290f8cd0d88b9b1837fe64f80db2b6dbe51dda82ae' 
  AND token = '3cteakUVhCXxDNDvQ7gGebpVblav4qMTkfgr3fYwvBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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