Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b11ce1b3315c9d4f7238a31e3a2332c0dde4cb9a8c2870fe3c4383591edf433a' 
  AND token = 'nRpzv9LuOD3cByQGeRpSibwnl3w1LTov8WFmXJW/GFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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