SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd1b066edf2f24560d275a277805c20ccbe34466817fc1a499361701f3cf7475' 
  AND token = '042YhKFaPBEZbnGBIhRUA8F/8Ez1SR+BeDGsgqdJA4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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