Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2759199659984a9bbff788206cf888a06c24ce909dd3f7442ec5ede02d973e2' 
  AND token = 'KaUM8cWPXZLRmCdOEi3q/sDjXn3njoPkVwOaaKT709g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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