Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '470325d5416ca546219e8a34a575e137082f3035d7b5a90fee696e2fdf2a7cd9' 
  AND token = 't1xzCuL/wz0x5sJzszbvjrywlc0AEqyTxEYJiiSEMN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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