Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b78fa02234eb1d9f6e745fa5a2fd2806050dd96d26654de77664a5ea3dcef0b9' 
  AND token = 'wSzLDXpBfFBe/adatSlCfnEiYnGmcTF4PjXs9LtAlwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00137

JSON explain

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