Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a02afd0e05e8c0f5947cc7ad4ef4e0626319c92c595955f01f4aee83c86d21a' 
  AND token = 'pKMEqpbsrD6p9xtxYj/OyMHC5jMF02TXQlWcgNfC+wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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