Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7bb10f8e0249b5cb3dc8a0502c1f98c99ade6ef9c53049bb573a194ca4cd453' 
  AND token = 'Ss4AeZNa8rGfK3i5wyMod5LUS/WNCSRb8k3sxFe+cyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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