Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37447d6efffb78c35bf1d40200285f92171ca5ff848317e5907bf1d15a150bff' 
  AND token = 'laS/szd/QgCvEfWt+k+hn0QwdQP3p0oJWdLfVL9kacg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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