Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adc62f3bda8d28732b03bc974710b251c87df5aa142a981bbbd06230259c2fac' 
  AND token = 'veHNRWAaxIZkhc57yd+e7qTJyr8MkjgBwfGcWo5vBjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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