Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18d47ae6674495a24143c5297a28aa080a834cd2909ef7b1cda18018cd0a98ba' 
  AND token = 'XZEm6R3j75R8N/eRPVVyr3uPkD8wPMasmsVm60EHrnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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