SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f669439e8c835a3225747c68f8df8cd0113dbe4da491498647c5add05591e9d7' 
  AND token = '9C19tdJ6Jvwlgen7jKXVJYwiZTXzq1P0hD8hPiPADxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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