Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57a538200f82f2f45ea3e30a0e6726f3e9362158fa160a879e29d07fdab2f628' 
  AND token = 'WEILhVEQ57xZEhCY7mFHq+mOfI1ciN22hdW7e6DPTsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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