Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b66d12882778abf881cad8e4e962c8812eea8227a0a21eb4b1c06b9ee185c16' 
  AND token = 'S/oivTODZn4O1vo+j5ToohUMMvkeCCpvEH4i8FPKJ7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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