Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f909baed87aa8060eccd7009835fa7c60fb2d95df539be4ebc94a9396ebc09' 
  AND token = 'ki/EqPSIefXfWcovaTdloIdvk0ZqLe3dGCzQ5Ol7LI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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