Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bc3d13bec5f47abe857b17d406537e986239bbfcde09e18c5d1d5eaaa03da8d' 
  AND token = 'L2XS6SlvmO8PNg6fSfDVqnW5LqBOck2Q8Adjlu9lOKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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