SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81843c8ae9f5a87b0b063e903983a7d32361b6fbb7957ee3a6e1a73e07757c91' 
  AND token = 'ae5dFzxoFe0RKbI1FwttuO6ec2C8XLMwH3zXbgGBKHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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