SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c178b525666773df5d3e3e9aa9f4d3cbf02e5250c336f7cb8ef3ce3541178d2f' 
  AND token = 'ZhZLSGFT7Ba33o1c8BJwThg7lrmbIbWNvstGKGV+TeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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