Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e0839c4bbeafcc2aa7f9e8a5b9f8a1ff371bfa45ce06af32fd214e935752eed' 
  AND token = 'hWRZedZTBx0AAJevpNIio8lYoipqhvoI+W5UNjseDtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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