Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87fb67e0b4c656b060625593808562932df7e5064409b15ab62a84df25891fc9' 
  AND token = 'YslIezDzUHJKN1JOTNzquxkcu8am4Fn4z6dwXLw95MY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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