Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6722f0f6975aca999abcaaefdf4c4d451673704ad47c3e692afb2df26c6165da' 
  AND token = 'AFFN+UhVl/2h+e4AJo/DD6jIgoPqoWxWIftUKo92jz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}