Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc874f3c4cd8ff6c46cb0da0545fb237832f24a36ffd9cd89f8dd114d62fad00' 
  AND token = 'z5id15E7lwMnh6RsDeIr6mZhx5onmBUtyfgHDKr3mNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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