Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '08dfacde7e3bfc88ebc43c80fba1c5115650c8bfb764a23617f2b32c21ac22ce' 
  AND token = '72AiPCYXT7opWaaWQ5/DKjtZMXviCz65TH6qPZngtdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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