Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4e93fecfccd2440fa163f34491bb187755255476bd5ab2cb80e1d367604addb' 
  AND token = 'tThFq9/TZ8iwcgTiGevP6UE0bbEjYvvg+TWkqEyqQ+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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