SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dfca5b90277d6b17b2c3367e8191aa83b510e53a4bea87763e4f07c649799d9' 
  AND token = 'GAhohmHZPQFlrnw2FU7oqxmcdW21vReJR/dwg1ZgpNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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