Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2974a3a6927ccacbcfef6d0ce731ee27a05cb9ecb61c623b1886e7e9feabde7' 
  AND token = 'fNBuB2j3lJT/y0vREy/yOIxGHKKrX6SKtEngnaLlH3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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