Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '275d995e935a0303a349e306ddcbb885b174d68935182ecb8a285f3db8369bb8' 
  AND token = 'Yy6R8qSYCjtHer3NP1BSNGd0paqaA94iw3IBtnOv3VU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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