Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fce6d340424db68b62fa307e24e3b708af0a22d0c67a54e78953ae2255a4e0e5' 
  AND token = 'JE5j2p2UXHD4HfN2hFga8HuEcXYBrz9xMNWnjn7AM54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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