Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54661e2233111247500e20ca9af97c1b24e21925222efbf1c4eed7f3229447a4' 
  AND token = 'SvxEqyL9VqA6SCCvTzXOigMdk0PdUbGObrgCJcYb944=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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