Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '613557c4362d44b195b12a1b875591654057bd01553a33d518ed6f5180aabf00' 
  AND token = 'mRlrd0TVVb0KVdHiZ6Z3mkoQWek2p9CRaKY2nkJdups=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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