SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd2698b5ee944ae9c21a971c4bd32466606c9c1483d408dc18212f868efd3adc' 
  AND token = 'smqJmsjuvWvjvGBcQqF3T/xKMRU5zJtGZZ7VXp9q5qU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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