Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '782e0d5050712f0f034b9fbed4be83203eee1cc084bdf63591f772ddf5fd514d' 
  AND token = '8lqyXAadOxCUMNtHjkCtI8bA+DtbfmuW+43WLa8OsFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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