Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19caf9449b0ff084f56ba8062cca3912a45b8683267ef965c7627b6478aeccad' 
  AND token = 'vLvcKmE4ukAA5scx5KAZNGuUL7RWPi4Yn2p+7k3/7vM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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