SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13a7e9243c0b1e16cd33a4edefb8f09b9427a425f240ede8c8ef0cd1b5bf6e04' 
  AND token = 'BO59G6v+w8qMg4GYsQ3pZPDAdB0KcneYIKxz4mF8JVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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