SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e0ed2df75b670b78941024ec4967d51b7ac26a5ff6ece01024ecf8ad6315a4a' 
  AND token = '018a1Y6AZOBS6GTWELuHDDVtURYC3kO9YmzGfae04vM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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